package com.atguigu.gulimall.common.valid;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.HashSet;
import java.util.Set;

public class ListValueConstraintValidator implements ConstraintValidator<ListValue,Integer> {
    private Set<Integer> set=new HashSet<>();
    /**
     * 初始化方法
     * @param constraintAnnotation annotation instance for a given constraint declaration
     */
    @Override
    public void initialize(ListValue constraintAnnotation) {
        int[] vals = constraintAnnotation.vals();
        for(int val : vals){
            set.add(val);
        }
    }

    /**
     * 判断是否校验成功
     * @param value object to validate
     * @param context context in which the constraint is evaluated
     *
     * @return
     */
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext context) {

        return set.contains(value);
    }
}
